1. C. Kittel, Quantum Theory of Solids (New York: John Wiley & Sons, 1987).
2. W. Masson, ed., Applications to Quantum and Solid State Physics Vol. IV (New York, Academic Press, 1968).
3. L. Lifshic, Izabrannie trudi (Moscow: Nauka, 1987).
4. Y.M. Soifer and N.P. Kobelev, Proc. XII Int. Congress on Acoustics, G6-3, Toronto, 1986.
5. V.A. Krasilnikov and V.V. Krilov, Vvedenie v fizicheskuju akustiku (Moscow: Nauka, 1987).